South Korea’s impeached President Yoon Suk Yeol was formally arrested early on Sunday, days after being apprehended at his presidential compound in Seoul. He faces possible imprisonment over his ill-fated declaration of martial law last month.

The decision to arrest Yoon triggered unrest at the Seoul Western District Court, where dozens of his supporters destroyed the court’s main door and windows.

A Seoul court has issued a warrant to formally arrest impeached President Yoon Suk Yeol over his failed martial law declaration last month, marking the first-ever detention of a sitting South Korean president.